Jaw crusher



June 20, 1967 T. M. CONNOLLY ET AL 3,326,479

JAW CRUSHER Filed Feb. 18, 1965 2 Sheets-Sheet nlEmuilglllin" INVENTORS.THEODORE M. CONNOLLY NORMAN C. GRAHAM Magaly, 1%

A TTORNEV June 20, 1967 r` M CONNQLLY ET AL 3,326,479

JAW CRUSHER Filed Feb. 18, 1965 Z2 Sheets-Sheet 2 INVENTORS. THEODORE M.CONNOLLY NZRAN C. GRAHAM BY Ma/ ,d

ATTORNEY United States Patent O 3,326,479 JAW CRUSHER Theodore M.Connolly and Norman C. Graham, Ashtabula, Ohio, assgnors to UnionCarbide Corporation, a corporation of New York Filed Feb. 18, 1965, Ser.No. 433,623 3 Claims. (Cl. 241268) The present invention relates to jawCrushers of the type used for breaking rock and the like. Moreparticularly, the present invention relates to an improved Aarrangementfor adjusting the throw and opening of Blake-type jaw crushers such asare described in The Handbook of Mineral Dressing '1`-aggart, publishedby Wiley, 1945.

The Blake-type jaw Crusher, which is characterized by having a iixed jawand an oscillating movable jaw, is widely known and commonly used forbreaking rock and the like. However, Iadjustment of the jaw opening of aBlaketype Crusher fand adjustment of the throw, ie., the displacement ofthe movable jaw during oscillation, has been a very time-consumingoperation requiring the disconnecting and reconnecting of bolted andmore or less permanently attached parts.

I-t is therefore an object of the present invention to provide means forrapidly adjusting the -jaw opening and throw of Blake-type jaw Crushers.

Other objects will be apparent from the following description and claimstaken in conjunction with the drawing in which:

FIGURE 1 shows a `Blake-type jaw Crusher incorporating an adjustingarrangement in vaccordance with the present invention,

FIGURES 2 and 3 show portions of the adjusting arrangement of FIGURE lin more detail and FIGURE 4 shows a further embodiment of the presentinvention.

Withreference to the drawing, FIGURE 1 shows a Blake-type jaw crusherhaving incorporated therewith the adjusting means of the presentinvention.

In the `drawing FIGURE 1 illustrates a jaw Crusher having a main frame 1on which is arranged a iixed jaw 3 and a movable jaw 5. The movable jaw5 is pivoted on swing-jaw shaft 6 and is actuated by a reciprocatingdrive mechanism 7 and is thus caused to oscill-ate by virtue ofeccentric 8 and the action of the connecting means which comprisetoggles 9 and 10 pivotally connected to pitman 11. In operation pitman11 is caused to move up and down and the movable jaw 5 thus moves backand forth with respect to the xed jaw; this reciprocating displacementof the movable jaw during operation defines the throw of the Crusher. Asshown in the drawing toggles 9 and are pivotally engaged as indicated at12 and 13 respectively.

As can be easily visualized, it is frequently desirable to adjust boththe jaw opening and the throw of the Crusher. In Ithe present inventionthis is accomplished by providing a stepped member 19, which is suitablyiiXed to main frame 1, and a matching stepped member 21 Which is adaptedto be moved vertically by means of hydraulically operated adjustingcylinder 22. As shown in the drawing, Ithe stepped member 21 is slidablyengaged, for eX- ample in a keying arrangement 23, with block 24, so asto permit vertical movement with respect thereto. Also as shown in .thedrawing, the members 21 and 1:9 are arranged to be engaged with eachother in at least partial register, and these elements are adapted to beclamped and held in engagement by hydraulically operated holdreleasecylinder 25.

The operation of the present invention will be more fully understood bynoting that the conditions shown in the drawing represent minimum jawopening and maximum throw. To increase the jaw opening, in accordance3,326,479 Patented June 20, 1967 ICC with the present invention,hold-release cylinder 25 is released and the ram 26, controlled therebyis actuated and moved to the left and, by virtue of being engaged withblock 24, 4as shown, causes the stepped member 21 and block 24 to moveaway from the stepped member 19.

The adjusting cylinder 22 is then actuated .to raise the member asuitable dist-ance so that upon reactuating holdrelease cylinder 25, themembers 21 and 19 are re-engaged in register, but with a lower portionof member 21 being in contact with member 19. The result of theaforedescribed operation is to increase the jaw opening by a denitepredetermined increment by movement to the right. As shown in thedrawing, member 21 is slot-ted at 217 to permit the ram 26, controlledby the hold-release cylinder 25, to pass .there-through and thus notinterfere with the raising and lowering of the member.

To decrease the jaw opening, the steps of the foregoing operation areperformed in reverse order.

To -adjust the throw of the movable jaw 5, i.e. its displacement duringoscillation, hold-release cylinder 25 is released and cylinder 28 isthen actuated lto raise or lower block `24 a desired amount.Hold-release cylinder 2'5 is then react-dated to clamp block 24 to themain frame. Since block 24 :and stepped member 21 are slidably engagedlat 23, member 21 is held in place by adjusting cylinder 22 during thisadjustment.

The position represented in FIGURE 1 represents maximum throw.Consequently, raising or lowering block 24 from the illustrated position`decreases the throw of movable jaw 5 by changing the effective lengthof the pivotally mounted hinged connecting means between the movable jawand Ithe main frame.

FIGURES 2 and V3 of the drawing more particularly illustrate the detailsof member 21 and the elements c0- operating therewith. As s-hown, ram 26is engaged with blo-ck 24 `so as to be capable of clamping block 24 andmember 21 to the main frame or to permit, when released, the verticalmovement of block 24.

1n ya further embodiment of the present invention illustrated in FIGURE4 stepped members 30 and l32 are arran-ged to be in at least partialregister as shown and can be adjustably clamped to the main frame bycylinder B4. By raising or lowering member 32 by means of cylinder 36,the extent of register between members 30 and 32 is altered and the `jawopening of .the crusher is accordingly adjusted.

The throw of movable jaw 5 is adjusted by Iretracting or .advancingwedge 38 by mean-s of cylinder 40 whereby the eiective length of thepivotally mounted hinged connecting means, comprising toggles 9 and 10,is altered. Wedge 38 is held in its desired position by cylinder 42 andstop 44 which is fixed to the main frame as indicated. The member 32 isslotted as shown at 45 to permit the wedge 38 to pass therethrough.

In all embodiments of the present invention, the illustrated hydrauliccylinders can be replaced by jacks so as t0 provide means for clamping:and release of the members engaged therewith.

Prom the foregoing description it can be seen that the present inventionprovides a simple and easily operable means for :adjusting both the jawopening and throw of Blake-type Crushers.

What is claimed is:

1. In a jaw crusher having -a main frame, a Xed jaw mounted on the mainframe, a movable jaw pivotally mounted on .the main frame, a firstconnecting means pivotally connected to said movable jaw and to alreciprocating driving means, second connecting means pivotallyconnected to said reciprocating driving means and Iadapted to beconnected to the main frame so as to establish a desired minimum openingbetween the -xed jaw and the movable jaw, the improvement whichcomprises an assembly comprising rs-t and second stepped membersYarranged to be in -a-t least partial registered engager ment, saidassembly being pivotally engaged to said second connecting means; meansto change the extent of registiered engagement between the rst andsecond stepped members to thereby vary the opening between the xed jawand the movable jaw; and means adjustable to clamp said assembly .to themain frame.

2. Apparatus in accordance with claim 1 wherein s aid second connectingmeans is slidably engaged with the assembly comprising first and secondstepped members and wherein means are provided to clamp said secondconnecting means to said assembly.

3. Apparatus in accordance with claim' 1 wherein means are provided topermit adjustment of the position of the assembly comprising rst landsecond stepped members with respect to the main frame.

References Cited UNITED STATES PATENTS 5,128 10/ 1882 Great Britain.

WILLIAM W. DYER, IR., Primary Examiner.

1. IN A JAW CRUSHER HAVING A MAIN FRAME, A FIXED JAW MOUNTED ON THE MAINFRAME, A MOVABLE JAW PIVOTALLY MOUNTED ON THE MAIN FRAME, A FIRSTCONNECTING MEANS PIVOTALLY CONNECTED TO SAID RECIPROCATING DRIVING MEANSAND CIPROCATING DRIVING MEANS, SECOND CONNECTING MEANS PIVOTALLYCONNECTED TO SAID RECIPROCATING DRIVING MEANS AND ADAPTED TO BECONNECTED TO THE MAIN FRAME SO AS TO ESTABLISH A DESIRED MINIMUM OPENINGBETWEEN THE FIXED JAW AND THE MOVABLE JAW, THE IMPROVEMENT WHICHCOMPRISES AN ASSEMBLY COMPRISING FIRST AND SECOND STEPPED MEMBERSARRANGED TO BE IN AT LEAST PARTIAL REGISTERED ENGAGEMENT, SAID ASSEMBLYBEING PIVOTALLY ENGAGED TO SAID SECOND CONNECTING MEANS; MEANS TO CHANGETHE EXTENT OF REGISTERED ENGAGEMENT BETWEEN THE FIRST AND SECOND STEPPEDMEMBERS TO THEREBY VARY THE OPENING BETWEEN THE FIXED JAW AND THEMOVABLE JAW; AND MEANS ADJUSTABLE TO CLAMP SAID ASSEMBLY TO THE MAINFRAME.